Good detective work! I figured it was something to do with the start of the month. Maybe Mark wrote some limit into his beta version? Hope it is fixed soon, as I have an installation coming up shortly and would like to use the new powers of v2.

Thank god other folks were having the same issue; I thought I was totally screwed for my next performance. I didn't previously know about an October 1st bug, but like Aolis, changing the system date to Sept. fixed this issue.
One other thing...when trying to put in a bug report, I attempted to use the "get-recent-isadora-crashes" app, and on every open i get the message, "The operation couldn’t be completed. (OSStatus error -67049.)" Any ideas?

Mark has a show opening tomorrow night in London, so this couldn't happen at a worse time for a code level bug.
If this requires a critical fix for any of your projects before the weekend, please mention this in your bug reports so I can gauge the level of urgency.

Meantime, please post here anything unusual that you have done or changed on your systems in the last few days. It is very strange... that all your versions were working fine, until the same day... today basically.

If it really is just a date error, then the obvious workaround till the weekend will be to change the dates on your machine! If so, this will go down in Isadora history as the October 1st turn-back-time mythical folklore!! :)

I am not experiencing this issue myself, but I use a USB licence. Are any of you running a USB version of 2.0.0b4?
Also if you can remember how long ago you downloaded this version from the webpage, please let me know.

I am not on USB. On my workhouse mac, I downloaded as soon as available, but trying everything, I reloaded it fresh today, as I trashed preferences.

On this machine, I install and desinstall a lot of stuff, last Resolve 11.1 version with last CUDA (I tried to come back to the old one), many codecs, black-Magic design desktop video for Ultrastudio MiniMonitor and so on.

But the strange is my second computer, brand new buyed only for Isadora, with FCPX, Motion and Compressor have the same behavior with a 2.0.0b4 downloaded 1 week ago.

FYI: I am trying to use the app contained in the "get-recent-isadora-crashes.zip" you have linked above and am receiving this error: ".....app is damaged and can't be opened. You should move it to the Trash."

I found another version I found posted by Mark on the forum however it provides the same error - also (and I'm notorious for loosing my own nose - but) I do not see it posted on the Support page . . .